Take a listen to ZBW-CLIPR-July 19-1930Z - at elapsed time 9:15, 10:40, 16:50, 27:15 mins into the recording. They are mostly handoffs of Gnl aviation traffic, but the SWA502 was turning westbound (KISP-KTPA). But I also heard handoffs to ZNY 128.3...hmmm...

the SWA502 was turning westbound (KISP-KTPA). But I also heard handoffs to ZNY 128.3...hmmm...

Ok thanks. You can hear SWA502 get cleared direct Robinsville and up to FL320, then over to 128.67, which would put the sector in the area of ZNY56-Kennedy (normally 125.325). (You can also confirm it by looking at their track on flightaware). Maybe a sub for 125.325 or they have split off part of ZNY56 into a new sector ?